MP3 Wave Editor

[minirobo]

Hi,

I have made a recording from a desk onto a computer and have two main problems. The recordinig is only coming out of the L/Speaker and I have computer interference from the R/Speaker. [This is as a result of the desk].
What I am simply trying to do is have the L/Channel recording only with the R/Channel muted, and then this signal converted into a mono to have the one single feed out of both speakers. Thus getting rid of the R/Channel Interference.

Is there anything that can do this?

Thanks, Paul R